Usefulness of the on-line data base CANCERLIT: an evaluation study based on consecutive searches in CANCERLIT and MEDLINE for oncologists.

Two on-line data bases of the National Library of Medicine, CANCERLIT and MEDLINE, were evaluated in a user-oriented study for their usefulness for oncologists in cancer research and in clinical practice. The CANCERLIT data base was preferred for 12 of 16 literature searches requested by oncologists, and in 4 instances no preference was indicated. The implications of the study are discussed with regard to data base content and user preferences.